package com.zhaozhaonews.search.service.impl;


import com.alibaba.fastjson.JSON;
import com.zhaozhaonews.model.common.dto.ResponseResult;
import com.zhaozhaonews.model.common.enums.AppHttpCodeEnum;
import com.zhaozhaonews.model.serach.dto.UserSearchDto;
import com.zhaozhaonews.model.user.entity.ApUser;
import com.zhaozhaonews.search.service.ApUserSearchService;
import com.zhaozhaonews.search.service.ArticleSearchService;
import com.zhaozhaonews.util.thread.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author WanJl
 * @version 1.0
 * @title ArticleSearchServiceImpl
 * @description
 * @create 2025/2/21
 */
@Service
@Slf4j
public class ArticleSearchServiceImpl implements ArticleSearchService {
    @Autowired
    private RestHighLevelClient restHighLevelClient;

    @Autowired
    private ApUserSearchService apUserSearchService;

    /**
     * ES 新闻分页搜索
     *
     * @param dto
     * @return
     * @throws IOException
     */
    @Override
    public ResponseResult search(UserSearchDto dto) throws IOException {
        //1、检查参数
        if (dto == null|| StringUtils.isBlank(dto.getSearchWords()))
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);

        //异步调用  保存搜索记录
        ApUser user = AppThreadLocalUtil.getUser();
        log.info("search服务获取APP登录用户--->{}",user);
        if (user!=null&&dto.getFromIndex()==0){
            apUserSearchService.save(dto.getSearchWords(), user.getId());
        }


        //2、设置查询条件
        SearchRequest searchRequest = new SearchRequest("app_info_article");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        //关键字分词后查询
        QueryStringQueryBuilder queryStringQueryBuilder =
                QueryBuilders.queryStringQuery(dto.getSearchWords())
                        .field("title")
                        .field("content")
                        .defaultOperator(Operator.OR);
        boolQueryBuilder.must(queryStringQueryBuilder);

        //查询小于最小时间mindate的数据
        RangeQueryBuilder rangeQueryBuilder =
                QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime().getTime());
        boolQueryBuilder.must(rangeQueryBuilder);

        //分页查询
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(dto.getPageSize());

        //按照发布时间倒序查询
        searchSourceBuilder.sort("publishTime", SortOrder.DESC);

        //标题设置高亮 title
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");//设置的字段
        highlightBuilder.preTags("<span style='color:red; font-size:inherit'>");//样式开始标签
        highlightBuilder.postTags("</span>");//样式结束标签
        searchSourceBuilder.highlighter(highlightBuilder);

        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse =
                restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        //把搜索结果封装并返回
        List<Map> list=new ArrayList<>();
        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            String json = hit.getSourceAsString();
            Map map = JSON.parseObject(json, Map.class);
            //处理高亮
            if (hit.getHighlightFields()!=null&&hit.getHighlightFields().size()>0){
                Text[] titles = hit.getHighlightFields().get("title").getFragments();
                String title = StringUtils.join(titles);
                map.put("h_title",title);
            }else {
                map.put("h_title",map.get("title"));
            }
            list.add(map);
        }

        return ResponseResult.okResult(list);
    }


}
